/* Copyright (c) 2007 Paul Bakaus (paul.bakaus@googlemail.com) and Brandon Aaron (brandon.aaron@gmail.com || http://brandonaaron.net)
 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
 *
 * $LastChangedDate: 2007-12-20 08:46:55 -0600 (Thu, 20 Dec 2007) $
 * $Rev: 4259 $
 *
 * Version: 1.2
 *
 * Requires: jQuery 1.2+
 */

(function($){
   
$.dimensions = {
   version: '1.2'
};

// Create innerHeight, innerWidth, outerHeight and outerWidth methods
$.each( [ 'Height', 'Width' ], function(i, name){
   
   // innerHeight and innerWidth
   $.fn[ 'inner' + name ] = function() {
      if (!this[0]) return;
      
      var torl = name == 'Height' ? 'Top'    : 'Left',  // top or left
          borr = name == 'Height' ? 'Bottom' : 'Right'; // bottom or right
      
      return this.is(':visible') ? this[0]['client' + name] : num( this, name.toLowerCase() ) + num(this, 'padding' + torl) + num(this, 'padding' + borr);
   };
   
   // outerHeight and outerWidth
   $.fn[ 'outer' + name ] = function(options) {
      if (!this[0]) return;
      
      var torl = name == 'Height' ? 'Top'    : 'Left',  // top or left
          borr = name == 'Height' ? 'Bottom' : 'Right'; // bottom or right
      
      options = $.extend({ margin: false }, options || {});
      
      var val = this.is(':visible') ? 
            this[0]['offset' + name] : 
            num( this, name.toLowerCase() )
               + num(this, 'border' + torl + 'Width') + num(this, 'border' + borr + 'Width')
               + num(this, 'padding' + torl) + num(this, 'padding' + borr);
      
      return val + (options.margin ? (num(this, 'margin' + torl) + num(this, 'margin' + borr)) : 0);
   };
});

// Create scrollLeft and scrollTop methods
$.each( ['Left', 'Top'], function(i, name) {
   $.fn[ 'scroll' + name ] = function(val) {
      if (!this[0]) return;
      
      return val != undefined ?
      
         // Set the scroll offset
         this.each(function() {
            this == window || this == document ?
               window.scrollTo( 
                  name == 'Left' ? val : $(window)[ 'scrollLeft' ](),
                  name == 'Top'  ? val : $(window)[ 'scrollTop'  ]()
               ) :
               this[ 'scroll' + name ] = val;
         }) :
         
         // Return the scroll offset
         this[0] == window || this[0] == document ?
            self[ (name == 'Left' ? 'pageXOffset' : 'pageYOffset') ] ||
               $.boxModel && document.documentElement[ 'scroll' + name ] ||
               document.body[ 'scroll' + name ] :
            this[0][ 'scroll' + name ];
   };
});

$.fn.extend({
   position: function() {
      var left = 0, top = 0, elem = this[0], offset, parentOffset, offsetParent, results;
      
      if (elem) {
         // Get *real* offsetParent
         offsetParent = this.offsetParent();
         
         // Get correct offsets
         offset       = this.offset();
         parentOffset = offsetParent.offset();
         
         // Subtract element margins
         offset.top  -= num(elem, 'marginTop');
         offset.left -= num(elem, 'marginLeft');
         
         // Add offsetParent borders
         parentOffset.top  += num(offsetParent, 'borderTopWidth');
         parentOffset.left += num(offsetParent, 'borderLeftWidth');
         
         // Subtract the two offsets
         results = {
            top:  offset.top  - parentOffset.top,
            left: offset.left - parentOffset.left
         };
      }
      
      return results;
   },
   
   offsetParent: function() {
      var offsetParent = this[0].offsetParent;
      while ( offsetParent && (!/^body|html$/i.test(offsetParent.tagName) && $.css(offsetParent, 'position') == 'static') )
         offsetParent = offsetParent.offsetParent;
      return $(offsetParent);
   }
});

function num(el, prop) {
   return parseInt($.curCSS(el.jquery?el[0]:el,prop,true))||0;
};

})(jQuery);